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Winmail Viewer app icon

Open winmail.dat, MSG and EML files on your phone

Someone sent you a winmail.dat and nothing on your phone will open it? Outlook and Exchange sometimes pack a message and its attachments into one TNEF file. Winmail Viewer unpacks it: the message, its formatting and every attachment inside, without uploading anything.

  • winmail.dat
  • MSG, EML, MHT
  • Attachments
  • On-device
Get it on Google PlayiOS version coming soon
Winmail Viewer screenshot 1 Winmail Viewer screenshot 2 Winmail Viewer screenshot 3 Winmail Viewer screenshot 4

Opens the mail files Android can't

Everything a message contains

Sender, recipients, date and subject; the body with its formatting, whether HTML, plain text or Outlook's RTF; every attachment to open, save or share; and the full headers when you need them. International mail displays correctly whatever its encoding.

Private by design

Every file is parsed on your device by the app's own reader; no server sees your mail. Remote images in HTML messages are blocked by default because they are usually tracking pixels, and load only if you choose.

Questions

What is a winmail.dat file?
A TNEF file created by Microsoft Outlook or Exchange when it sends formatted mail. Mail apps that do not understand TNEF show it as a mysterious attachment instead of the real message and files.
How do I open winmail.dat on Android?
Tap the attachment in your mail app and choose Winmail Viewer, or share the file to it from a file manager. The message and its attachments appear straight away.
Are my emails uploaded?
No. Everything is read on your phone, and nothing is sent anywhere.

Free on Google Play, supported by ads. Read the Winmail Viewer privacy policy. Questions or a bug? Write to support@tahatec.com.